Simplify headers transfer

Write 500 status if not too late during error of forEach of body

lib/jsgi-node.js

@@ -39,6 +39,7 @@ function Request( request ) {
   var questionIndex = url.indexOf("?");
   this.method = request.method;
   this.nodeRequest = request;
+  this.headers = request.headers;
   if(questionIndex > -1){
     this.pathInfo = url.substring(0, questionIndex);
     this.queryString = url.substring(questionIndex + 1);
@@ -69,30 +70,16 @@ Request.prototype = {
   scriptName: "",
   scheme:"http",
   get host(){
-  	var host = this.nodeRequest.headers.host;
+  	var host = this.headers.host;
   	return host ? host.split(":")[0] : "";
   },
   get port(){
-  	var host = this.nodeRequest.headers.host;
+  	var host = this.headers.host;
   	return host ? (host.split(":")[1] || 80) : 80;
   },
   get remoteAddr(){
   	return this.nodeRequest.connection.remoteAddress;
   },
-  get headers(){
-  	if(this._headers){
-  		return this._headers;
-  	}
-  	var headers = this.nodeRequest.headers;
-  	var lowerCaseHeaders = {};
-  	for(var i in headers){
-      lowerCaseHeaders[i.toLowerCase()] = headers[i];
-  	}
-  	return this._headers = lowerCaseHeaders;
-  },
-  set headers(value){
-  	this._headers = value;
-  },
   get version(){
   	return [ this.nodeRequest.httpVersionMajor, this.nodeRequest.httpVersionMinor ]
   }
@@ -200,6 +187,10 @@ function Response( response, stream ) {
       if(canceller){
         stream.addListener("close", canceller);
       }
+      try{
+      	// if it is not too late, set the status
+      	response.writeHead(500, {});
+      }catch(e2){}
       response.write( "Error: " + e.stack );
       response.end();
     }